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Foundation pit supporting method combining cast-in-place rectangular piles and high-pressure jet grouting piles
A cast-in-place rectangular pile and high-pressure jet grouting pile combined foundation pit supporting method comprises the specific steps that S1, hydraulic hole forming is conducted on a high-pressure jet grouting pile, and the rough contour of a supporting pile is formed; s2, cement paste is sprayed from bottom to top to form a jet grouting pile; s3, after construction of the high-pressure jet grouting piles is completed, rectangular pile contour cylinders are inserted; s4, a rectangular pile contour cylinder is lifted out, and a support pile reinforcement cage is placed in a rectangular cavity; s5, rectangular pile body concrete is poured; s6, soil bodies between the existing support piles are reinforced through high-pressure jet grouting piles, and a high-pressure jet grouting pile waterproof curtain is formed; and S7, after the strength of the waterproof curtain meets the design requirement, anchor cables are installed from top to bottom according to the principle of first supporting and then digging, and soil is symmetrically excavated in a layered mode. The high-pressure jet grouting piles are used for forming the waterproof curtain, the waterproof waterproof curtain is formed by jet grouting of the high-pressure jet grouting piles in the range below the supporting piles, and the supporting and water interception integrated foundation pit supporting method is formed.
一种现浇矩形桩与高压旋喷桩相结合的基坑支护方法，其具体步骤为：S1.高压旋喷桩水力成孔，形成支护桩的大致轮廓；S2.自下而上喷射水泥净浆形成旋喷桩；S3.在高压旋喷桩施工完成后插入矩形桩轮廓筒；S4提出矩形桩轮廓筒，将支护桩钢筋笼放进矩形空腔内；S5.浇筑矩形桩桩身混凝土；S6.用高压旋喷桩将既有支护桩之间的土体进行加固，形成高压旋喷桩止水帷幕；S7.待止水帷幕强度达到设计要求后按照先撑后挖原则，自上而下安装锚索，并分层对称挖土。本发明利用高压旋喷桩形成止水帷幕，在支护桩以下范围采用高压旋喷桩旋喷形成不透水的止水帷幕，形成了一种支护、截水一体化的基坑支护方法。
Foundation pit supporting method combining cast-in-place rectangular piles and high-pressure jet grouting piles
A cast-in-place rectangular pile and high-pressure jet grouting pile combined foundation pit supporting method comprises the specific steps that S1, hydraulic hole forming is conducted on a high-pressure jet grouting pile, and the rough contour of a supporting pile is formed; s2, cement paste is sprayed from bottom to top to form a jet grouting pile; s3, after construction of the high-pressure jet grouting piles is completed, rectangular pile contour cylinders are inserted; s4, a rectangular pile contour cylinder is lifted out, and a support pile reinforcement cage is placed in a rectangular cavity; s5, rectangular pile body concrete is poured; s6, soil bodies between the existing support piles are reinforced through high-pressure jet grouting piles, and a high-pressure jet grouting pile waterproof curtain is formed; and S7, after the strength of the waterproof curtain meets the design requirement, anchor cables are installed from top to bottom according to the principle of first supporting and then digging, and soil is symmetrically excavated in a layered mode. The high-pressure jet grouting piles are used for forming the waterproof curtain, the waterproof waterproof curtain is formed by jet grouting of the high-pressure jet grouting piles in the range below the supporting piles, and the supporting and water interception integrated foundation pit supporting method is formed.
一种现浇矩形桩与高压旋喷桩相结合的基坑支护方法，其具体步骤为：S1.高压旋喷桩水力成孔，形成支护桩的大致轮廓；S2.自下而上喷射水泥净浆形成旋喷桩；S3.在高压旋喷桩施工完成后插入矩形桩轮廓筒；S4提出矩形桩轮廓筒，将支护桩钢筋笼放进矩形空腔内；S5.浇筑矩形桩桩身混凝土；S6.用高压旋喷桩将既有支护桩之间的土体进行加固，形成高压旋喷桩止水帷幕；S7.待止水帷幕强度达到设计要求后按照先撑后挖原则，自上而下安装锚索，并分层对称挖土。本发明利用高压旋喷桩形成止水帷幕，在支护桩以下范围采用高压旋喷桩旋喷形成不透水的止水帷幕，形成了一种支护、截水一体化的基坑支护方法。
Foundation pit supporting method combining cast-in-place rectangular piles and high-pressure jet grouting piles
一种现浇矩形桩与高压旋喷桩相结合的基坑支护方法
SONG LIWEI (author) / LIU XIAOMIN (author) / HUANG KEQI (author) / XU ZHAO (author) / DENG CHEN (author)
2024-02-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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